Problem: trace tx unit test should pass

[yihuang]

Closes: #XXX

Description

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For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

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For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• Reviewers assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.01%. Comparing base (e55b15c) to head (539404f).
Report is 1 commits behind head on release/v0.22.x-cronos.

Additional details and impacted files

@@                    Coverage Diff                     @@
##           release/v0.22.x-cronos     #529      +/-   ##
==========================================================
- Coverage                   64.05%   64.01%   -0.05%     
==========================================================
  Files                         130      130              
  Lines                        9788     9788              
==========================================================
- Hits                         6270     6266       -4     
- Misses                       3004     3006       +2     
- Partials                      514      516       +2     

see 2 files with indirect coverage changes